Telescopic elevator.



. v PATENTED MAR.20, 1906; J. K0vA6EvI.-- v TELESGOPIO ELEVATOR. APPLIOATION FILED MAY 18 1904 .17 or egg.

UNITED jsTATEs PATENT oFFIoE.

. JANKO 'KOVAGEVIC, or ALLEGHENY, PENNSYLVANIA.

scopic Elevators; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to a novel construction in a telescopic elevator, the object being to provide a device of this character which can be made portable and will be particularly adapted for use in armies for temporary lookout and signal .stations and which will be 0th erwise adapted for use in open spaces where it is desired to raise aperson to ahighlevel; and it consists in the features of construction and combinations of parts hereinafter fully described and claimed.

In the accompanying drawings, illustrating my invention, Figure 1 is a side elevation of a telescopic elevator constructed in accordance with my invention. Fig. 2 is a central vertical section of same in its folded position. Fig. 3 is a horizontal section on the line 3 3 of Fig. 2.

My said elevator consists of a plurality of substantiall rectangularframes A, B, C, and

D, referab y constructed ofsteel in a light an durable manner and each of-which comprises four corner-posts consisting, preferably, of heavy angle-irons E, which are connected by means of suitable cross-bars and braces F,

the angle-irons E of said members B, C, and D fitting within each other and forming guides for each other, said frames being longitudinally movable relatively to each other. Within the innermost member D is a longitudinally-movablecar G, the corner-posts H,

of which are movable in-the corners of the frame D. Mounted in the lower end portion of the said frame A is a Windlass J, over which cables K- are adapted to be wound, said cables being connected at their other ends to the upper rim of said car G and trained over a series of pulleys L, M, N, O, P, 'Q and R, said pulleys L being mounted upon the lower end 1portion of said member A, the ulleys on t e up er end portion thereof, t e pulleys N on the ower end portion of the member B,

the pulleys-O on the upper end portion of said member B, and ,so on, the said pulleys being so set that the said cables in .pass1ng Specification of Letters Patent. Applioatibn me'a May 18, 1904. Serial No. 208,536.

TELESCOPIC ELEVATOR.

Patented March 20, 1906.

. over one to the other thereof are maintained in a vertical line as nearly as possible, so as .to grevent them from running off said ulle s. y turnin said Windlass to wind sai cab cs on same t e said car G will first be raised to r the upper end of said frame D and before, reaching the per limit of.its movement,

u -which will'bedbtermined by suitable stops on said-member D, the said cables will raise said member D and successively thereafter the members 0 and B until each. of same has reached the upper limit of its movement.

The number of said members or frames A, B, C, and D may be increased or diminished as desired to attain any desirable elevation, as p will be obvious. I also provide platforms S at the upper ends of the members A, B, and C, upon which look-out may be stationed, if desired, or in the event that my said device is employed for sightseeing purposes at expositions, fairs, &c., to support a number of sight-seers at various elevations, said platforms being relatively so arranged that the floor of each will-be supported at a distance greater than the heightof a man above the next lower platform, so that as the said members B, C, and Dare let down there will be no possibility of accident.

\ My said device is very simple and efficient.

and can be constructed to lifta eral hundred feet, if desired.

I claim as my invention A telescopic elevator comprising in combination a plurality ofrectangular frames dis- PBI'SOII sevposed one within the other and movable telescopic'ally relatively to each other, the outer frames each comprising four L-shaped corner members connected with each other by means. of cross-bars, and the innermost member comprisingifour rectangular corner-posts connected by means of cross-bars, each outer set i of corner-posts constituting guides for the next succeeding inner-set of corner-posts, a rectangular platform disposed at the upper end of each of said outer rectangular frames, and being relatively so proportioned that each upper platform is smaller and fits within the next succeeding lower platform, pulleys mounted at the upper and lower ends of each outer frame at opposite sides thereof and dis posed so that their lanes, of rotation are inclined slightly to t e planes of the sides of said telescopic frames onwhich they are 'disposed and in. such relation that the grooves of the upper pulleys of each lower member are in vertic alinement at one point with one Irlwint in the grooves of the lower pulleys sively between their ends, substantially as of t e next adjacent inner frame, said puldescribed. 10 leys of succeeding inner frames being suc- In testimony whereof I aflix my signature cessively of larger diameter, a Windlass carin presence of two witnesses.

ried by the lower and outermost frame, ca- JANKO KOVACEVIC.

bles connected at one end with said Windlass Witnesses:

and at their other ends with said innermost RUDOLPH WM. LOTZ,

frame, and trained over said pulleys succes- E. F. WILSON: 

